Gearing



` terminate angles in respect to the stroke of the Nrra STATES F'ATENTrrrce GEARING.

SPECIFICATION ormig part of Letters Patent No. 306,809, dated October21, 1884.

Application filed March 12, 1884.

To all witam z'f maty concl'n:

Be it known that I, ROBERT CAMPBELL, a citizen of the United States.residing` in Allegheny, in the county of Allegheny and State ofPenns-ylvania, have invented a new and useful Improvement in Gearing, ofwhich the following is a specification.

My in vention rclates to gearing in which an arm or driving-head isattached to or forms part of an actuating piston-rod or connectingrod,the arm or driving-head affording a bear; ing or fulcrum carrying aform, web, disk, or lever engaging fiXed bearings arranged atdedriving-head, arm, connecting-rod, or pistonrod.

The object of my invention is an increase of leverage, or a more equaldistribution of the current force into power and speed. I attain thisobject by mechanism illustrated in the accompanying drawings, which forma part of this specification.

Similar letters refer to similar parts in the several views.

Figure l represents a frame, A, With bear' ings or guides C O O O (o c,Fig. 2) forming part of or affixed to it. The driving-arm G carries thefulcrum F, on which the disk or lever D vibrates. The arms b b connectthe disk or lever D with the bearing-headsa a, which slide on the facesof the guides C O C O, which detlect the stroke of the arms b b andcause the disk or lever D to vibrate on the fulcrum F. Bis the groove,through which is seenthe arm G and guide c. H is part of the piston-rod.E is the effective arm of the disk or lever D.

(X0 model.)

rFig. 2 is an end view of Fig. 1. c c are guides in which thedriving-arm G operates.

Figs. 3 and 4 represent different kinds of bearings. While the bearingsmaybe curved or straight, external or internal, supertieial, salient, orre-entrant, long or short-long to serve short bearing-heads, as shownvin the drawings, or short to serve long bearing-arms with equal effect,but not shown in the draw ings-it is preferable to use straight bearingsto secure an accurate measure of the distribution of the current. forceand a higher lever' age.

The distinctive Character of the invention is that the arin E is notdependent on a fixed fulcrum. I therefore disclaim the use of hy!pocycloidal curves in connection with a fixed fulcrum;

Having described my invention clearly, I claim as my invention thefollowing:

1. In gearing, a web, disk, or lever fulcrumed ona vibrating arm ordriving-head, substantially as set forth, and for the purposesdescribed. p

2. In gearing, a disk, web, or lever engaging deflecting bearings,substantially as set forth, and for the purposes described.

3. In gearing, bearings substantially as set forth and described, .andfor the purposes alleged.

ROBERT CAMPBELL.

VVitnesses:

O. I. MCKEE, R. B. MOKEE.

